Radiator siphon



Patented Aug. 24, 1926.

uairssrATEs PATENT OFFICE.

OTTO W. HEISE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO MANNING, MAX- .WELL & MOORE,' INCL, OF NEXN YORK, N. Y., A CORPORATION OF.NEW JERSEY.

RADIATOR SIPHON.

Application filed. January 22, 1923. Serial No. 614,087.

This invention relates to steam pressure gauges and more particularly to devices for protecting such gauges from excessive heating. I

An object of this invention is to transmit the pressure from a pressure source such as a steam boiler, to act upon a pressure gauge.

A further object is to transmit such pressure while preventing the transfer of heat from said steam to,said gauge.

A further object is to provide a connection between a steam gauge and a steam supply which will cause said gauge to function at all times without danger, destruction or other damage due to freezing of water contained therein.

A further object is to provide a device of the above character which will be efiicient in operation, rugged in construction and economical to manufacture.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

In devices of this character mechanical strength is desirable as the device is apt to be subjected to rough usage and poor heat conducting capacity is also desirable in order that the heat conducted to the gauge through the metal may be reduced to a mindon tube of the gauge shall not contain live steam in order that the. gauge parts may not be distorted or damaged by the temperature thereof but on the contrary that the tube itself shall be filled either with a cool gas such as air or with water of low tem perature or both.

It has been discovered that these condition may best be met with great effectiveness by providing separate elements for accomplishing the two functions. To this end, therefore, I prefer to provide one element which will furnish the necessary mechanical strength and preferably will be of poor heatconducting material, and a separate element for transmitting the pressure to the gauge, the latter element being preferably so constructed that it will radiate heat and, while transmitting said pressure to the gauge, will oppose a free interchange of steam and water between the gauge and the steam supply.

To accomplish these results I preferably provide an outer shell or grid-like formation which may be economically and satisfactorily made of cast iron and in the intennum. It is further desirable that they Bourwill be .exemplied in the constructions hereinafter set forth'and the scope of the application of which willbe indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawing, in which Figure 1 represents this improved siphon in elevation; and

Fig. 2 isan elevation in a plane at right angles to Fig. 1 with the outer parts in section more clearly to show the construction.

In the particular embodiment shown the numeral 1 designates a base threaded at 2 for connection to a source of steam such as a boiler. This base is provided with an axial opening clear through it anda valve 4: of the customary type may conveniently be provided for controlling communication through said opening. The upper end of the base 1 is threaded and a casing 6 is screwed thereon. This casing preferably of castiron has its central portion made of comparatively thin walled grid construction, whereby there is formed a central chamber 8. The upper portion of the casing is closed except for a small axial opening 10. The upperend of the casing is provided with an internallythreaded recess 11 for the reception of the bottom of the gauge, (not shown). The recess 11 has an internally threaded extension 18 at its bottom communicating with the opening 10.

A tube 13 having its central portion wound in spiral form as illustrated at 1% is disposed within the central chamber 8. The ends 15 of this tube extended along the axis of the spiral are adapted to fit tightly into the axial openings 3 and 10 of the stud 1 and casing 6 respectively.

A convenient manner ofcausing this connection to be tight is illustrated as comprising small soft metal sleeves 17, sur rounding the straight portions 15 and seated in the chamber 18 and, a similar assen) chamber 18 in the upper end of the base 1. Nuts "19 are provided which screw into the chambers 18 and 18 to engage the bushings. Thc'under sides of the nuts and the bottoms of the chambers have conical faces as illustrated at 20 to engage complenientally shaped surfaces of the bushing 17. By this construction the screwing downwardlyv of the nuts 19 will cause the bushing to form aitight joint between the tube and the axial openings. WVi'th the construction illustrated the pressure of the steam is transmitted fromthe boiler to the gauge through the tube 13 but by-reason ofthe large externalradiat ng, surface of-the tube the steam is condensed into water therein, so that only a'mi-Xture of cool air and cool water enters the eB'ourdon tube of thegauge.

B'y reason of the construction of the parts, little heat'isconducted to the gauge by the tube 13 because of its large radiating surface and its length, and little heat is conducted by the casing because of its form and the material .of which it is constructed.

The bore of the tube is such that-while freely transmitting the pressure of the steam to the gauge it,does not permit a free interchange between the water and air which may be in the tubeand the boiler so that there is no appreciable diffusion between the boiler and the gauge.

When the steam pressure decreases materially, as for example when the fires are drawn, in the boiler the water condensed inthe tube will gradually trickle into the boiler itself so that if subsequently the mechanism is subjected to freezing temperatures there is substantially no water in the gauge or tube to damage it.

Since certain changes may be made in the above construction and different embodiments of the invention could be made without-departing from the scope thereof, it is intended that all'matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of'the scope ofthe invention which, as a matter of language, might'beesaid to fall therebetween.

Having described my invention, which I claim; as new and desire to secure by Letters Patent, is

1; A device of the character described comprising in combination, a lower portion provided with means for connecting it to a steam boiler, said .portion having a passage adapted to communicate withthe interior of the boiler, an upper portion having means for supportinga-pressure gage, said second part having a passage adapted to communicate with the interior ofithc a hollow perforated shell connecting; said portions and holding them in spaced relation, anda tube having its opposite ends secured to said lower and upper portions respectively, said tube providing a conduit connectingv the passages in the respective parts, said shell and tube forming the solesupport for the gage the central portion of the tube being disposed in'a spiral located within the shell, every portion of the tube being directed downwardly away from that part having the gage supporting-means, whereby liquid or condensate will drain out of the device and heat conduction from the bottom part to the top part willbe minimized.

2. A device of the character described comprising a bottom part provided with means for attaching it to a steam boiler, said bottom part having a passage adapted to communicate with the interior of the boiler, a top part having means forsupporting a pressure gage, said top part having a passage adapted to-communicate with the pressure responsive element of such gage, a tube having its opposite ends dis-' posed in said passages, respectively, the tubeproviding a conduit connecting said passages, and an apertured shellsurrounding said tube to protect it from injury, said tube and shell forming the sole support for said top partwhereby heat conduction from the bottom part to the top part is minimized.

3. A protector for steam gages compris-- ing a base having means for connecting it to a steam boiler, said base having a passage ther through adapted to communicate with the interior of. the boiler, a substantially cylindrical casing secured at-one end to the base, said casing having grid-like side walls and a top provided with a socket for the reception of a pressure gage, said top having a passage therethrough opening into the socket, and a pipev of small diameter disposed within the casing, the opposite ends ofzthe pipe being connected to.

the top of the casing and to the base member respectively, the pipe connectmg the passage in said members, whereby any liquid in said pipe willdrain out the bot;

tom thereof and heat conduction from. the boiler to the pressure gage willfibe mini:- mized.

In testimony whereof I'afii'X my signature.

OTTO HE'ISEL 

